<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>计算器小练习</title>
    <link rel="stylesheet" href="./css/index.css">
</head>
<body>
    <div class="container">
        <div class="show">
            <input type="text" readonly value="0">
        </div>
        <div class="keys">
            <ul>
                <li class="btn start">开始</li>
                <li class="btn stop">结束</li>
                <li class="btn">归零</li>
                <li class="btn">缓存</li>
            </ul>
            <ul>
                <li>7</li>
                <li>8</li>
                <li>9</li>
                <li class="operator">÷</li>
            </ul>
            <ul>
                <li>4</li>
                <li>5</li>
                <li>6</li>
                <li class="operator">×</li>
            </ul>
            <ul>
                <li>1</li>
                <li>2</li>
                <li>3</li>
                <li class="operator">-</li>
            </ul>
            <ul>
                <li>0</li>
                <li>.</li>
                <li class="operator">=</li>
                <li class="operator">+</li>
            </ul>
        </div>
       
    </div>
    <script language="javascript" type="module" src="./js/index.js"></script>
</body>
</html>